Maximum Security was beaten in his first start.
The colt lined up in Monmouth Park in New Jersey on Sunday (Monday AEST) since the overwhelming favorite but was beaten by King For A Day.
assuming control to win by a length, with King stalking him he stumbled slightly in the start but got into the lead.
“I feel the next race will be better,” Maximum Security’s coach Jason Servis said.
“We needed to find that out of the way. I was glad to get it out of the way even though he got beat.”
It marked the first time Maximum Security was beaten in six starts, and the stumble might have been the difference.
“It was a difficult week,” Servis, who had debated whether to run Maximum Security since he was not convinced he was ready, said.
“He was feeling pretty good this morning. He jumped and kicking. However, the stumble hurt us a lot.”
King For A Day was the favourite after his triumph in the Sir Barton at Pimlico on the Preakness undercard.
Owned by Gary and Mary West, Maximum Security finished 1-3/4 lengths in front of Country House at the Kentucky Derby on May 4 but was disqualified by Churchill Downs stewards for interference to eventual Preakness winner War of Will.
The Wests are challenging the Kentucky Derby disqualification in court.
Maximum Security is expected to run at the Haskell Invitational.